Hello. Me and my boyfriend are trying to conceive our first baby. My last period was on the 27th September. We had sex on the 12th October - 2 days before my ovulation day. I took pregancy test when I was 10 DPO but it was negative. My next period was due 3 days ago and today I've noticed very very light spotting when I wiped. I put a pad on because I thought I started my period but when I went to the toilet again a few hours later, the pad was clean and the spotting was gone as well. I felt very light cramping today, but not like period cramps. I also had a headache and felt little bit dizzy. My nipples feel quite sore too. What can it be? Oh and I never used any contraception. Also I have very regular cycle.